Underage Kardashians Hit Sex-Themed 21-And-Over Nightclub — ILLEGALLY

Exclusive 16-year-old Kylie Jenner and 17-year-old Kendall Jenner went out on the town last night … partying at Vignette lounge in West Hollywood — a 21-and-over club, and it appears the club and the girls broke the law.

The club features Wax Rabbit every Tuesday night, featuring what the club calls “a new, voyeuristic, hip hop and nudity nightclub experience.”

So the burning question — how did Kylie and Kendall legally get in the club. We did some digging, and found the ONLY exception to the 21 and over law is if the underage person is employed as a musician, but the musician must be 18 minimum. Neither girl is 18.

An official for the Dept. of Alcoholic Beverage Control tells our sources … both the girls and the club appear to have broken the law and could have been cited had they been caught in the act. The official tells our sources his Dept. may launch an investigation.

And it gets worse … Even if the girls were 18 and there as musicians, they wouldn”t be allowed in if there is any nudity, and the club often features topless dancers on Wax Rabbit night.